2005. The Trigger.
It didn't begin with a deafening explosion, but with a quiet, deep shift. The Katla volcano in Iceland awoke. Its eruption wasn't the most powerful in history, but it was fateful—long, "jet-like," stretching for months. It ejected a record amount of sulfur dioxide (SO2) into the strategically crucial North Atlantic region. In the stratosphere, the gas transformed into billions of sulfuric acid droplets, creating a giant shield that reflected the sun's rays back into space.

A "volcanic winter" began, not instant and furious, but smoldering and suffocating. It lasted for 3-4 years. The sun became a pale disk in a milky haze; its light no longer provided warmth. It was enough. The fragile climate balance was shattered.

The Weakening and Retreat of the Gulf Stream.
The cold and the ocean's freshening from previously melting ice finished off Europe's main heater—the Gulf Stream. It didn't stop, but it weakened so much that it could no longer warm the continent. A permanent, incredibly powerful Siberian Anticyclone formed over Scandinavia and Siberia, pushing Arctic cold far to the south.

The Slow Descent into the Abyss (2007-2025).
The cooling wasn't a collapse, but a smooth, inescapable suffocation. Each winter was harsher than the last. Snow that fell in November did not melt by July. It accumulated, year after year, turning into a multi-meter layer of firn and ice. The white surface reflected even more solar energy, triggering the self-reinforcing feedback loop of "snow-ice-cold." By 2025, the process had become irreversible.

A World of the Last Lonely Few

By 2025, humanity did not go extinct. It dissolved into the vast, icy expanses. People ceased to be the planet's dominant species and became the rarest, almost mythical element of this new ecosystem.

The reality is this:

Imagine a map of Europe the size of a soccer field. And on that field—only one person. You. The probability of meeting another is comparable to the chance of finding a specific needle in a haystack that is constantly being buried by blizzards.

Those who survived have learned to do so perfectly. They do not go out unless absolutely necessary. Their shelters are deep underground bunkers, camouflaged basements, protected geothermal zones. Their smoke is carefully filtered, their light does not leak out, and any tracks in the snow are erased instantly.

After years of solitude and despair, the last survivors have arrived at a simple truth: the most dangerous beast in this new world is another human being. An encounter is not a cause for joy, but a reason for immediate stress. It is a potential threat to your supplies, your shelter, your life. Trust has become the rarest and most dangerous currency.

Any curtain moving in a window, any distant sound—is almost certainly a trick of the light or falling ice. And if it isn't... then it is the greatest danger and the greatest hope you can possibly imagine, merged into one. This world is dead not because there's no one in it, but because those who remain have become ghosts, afraid of their own shadows.

Create your character and try to survive in this inhospitable, cold world.